Originally Posted by coony3737
In the next couple weeks I'll be ordering up some tubing for my SRT6 so that I can fab up a custom exhaust. I was just wondering what size all of you are running.
The optimum tube size is the stock set up, your not gonna gain anything, but if you want to modify the exhaust I suggest you remove the cats for a smooth pipe. This should get you about 2-5 hp more. Remember the exhaust is designed by AMG who has more experience than you will ever have.